2.4. MATHEMATICALOPERATORS
61
Example60:image.jpg -bsr ’round(3
*
x/w,0)’ -cut 0,255
2.4.10 -cos (+)
Compute the pointwise cosine of selected images.
Example 61 : image.jpg --normalize 0,{2
*
pi} -cos.
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62
CHAPTER 2. LIST OF COMMANDS
Example 62 : 300,1,1,1,’20
*
x/w+u’ --cos -display
graph 400,300
Tutorial page:
http://gmic.eu/tutorial/trigometric-and-inverse-trigometric-commands.
shtml
2.4.11 -cosh (+)
Compute the pointwise hyperbolic cosine of selected images.
Example 63 : image.jpg --normalize -3,3 -cosh.
Example 64 : 300,1,1,1,’4
*
x/w+u’ --cosh -display
graph 400,300
2.4.12 -div (+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
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2.4. MATHEMATICAL OPERATORS
63
Divide selected image by specified value, image or mathematical expression, or compute the pointwise quo-
tient of selected images.
(eq. to
’-/’
).
Example 65 : image.jpg -div ’1+abs(cos(x/10)
*
sin(y/10))’
Example 66 : image.jpg --norm -add.
1 --div
2.4.13 -div
complex
Arguments:
• [divider
real,divider
imag],
epsilon>=0
Perform division of the selected complex pairs (real1,imag1,...,realN,imagN) of images by specified complex
pair of images (divider
real,divider
imag).
In complex pairs, the real image must be always located before the imaginary image in the image list.
Default value:
• ’epsilon=1e-8’.
2.4.14 -eq (+)
Arguments:
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64
CHAPTER 2. LIST OF COMMANDS
• value[%]
• [image]
• ’formula’
• (no arg)
Compute the boolean equality of selected images with specified value, image or mathematical expression, or
compute the boolean equality of selected images.
(eq. to
’-==’
).
Example 67 : image.jpg -round 40 -eq {round(ia,40)}
Example 68 : image.jpg --mirror x -eq
2.4.15 -exp (+)
Compute the pointwise exponential of selected images.
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2.4. MATHEMATICAL OPERATORS
65
Example 69 : image.jpg --normalize 0,2 -exp.
Example 70 : 300,1,1,1,’7
*
x/w+u’ --exp -display
graph 400,300
2.4.16 -ge (+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Compute the boolean ’greater or equal than’ of selected images with specified value, image or mathematical
expression, or compute the boolean ’greater or equal than’ of selected images.
(eq. to
’->=’
).
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66
CHAPTER 2. LIST OF COMMANDS
Example 71 : image.jpg -ge {ia}
Example 72 : image.jpg --mirror x -ge
2.4.17 -gt (+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Compute the boolean ’greater than’ of selected images with specified value, image or mathematical
expression, or compute the boolean ’greater than’ of selected images.
(eq. to
’->’
).
2.4. MATHEMATICAL OPERATORS
67
Example 73 : image.jpg -gt {ia}
Example 74 : image.jpg --mirror x -gt
2.4.18 -le (+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Compute the boolean ’less or equal than’ of selected images with specified value, image or mathematical
expression, or compute the boolean ’less or equal than’ of selected images.
(eq. to
’-<=’
).
68
CHAPTER 2. LIST OF COMMANDS
Example 75 : image.jpg -le {ia}
Example 76 : image.jpg --mirror x -le
2.4.19 -lt (+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Compute the boolean ’less than’ of selected images with specified value, image or mathematical expression,
or compute the boolean ’less than’ of selected images.
(eq. to
’-<’
).
2.4. MATHEMATICAL OPERATORS
69
Example 77 : image.jpg -lt {ia}
Example 78 : image.jpg --mirror x -lt
2.4.20 -log (+)
Compute the pointwise base-e logarithm of selected images.
70
CHAPTER 2. LIST OF COMMANDS
Example 79 : image.jpg --add 1 -log.
Example 80 : 300,1,1,1,’7
*
x/w+u’ --log -display
graph 400,300
2.4.21 -log10 (+)
Compute the pointwise base-10 logarithm of selected images.
Example 81 : image.jpg --add 1 -log10.
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